I've got one, they ride and respond real nice, on smoother sections with small bumps i can't tell a difference between it and my epic. Here is what i posted in the 29er section:

I did a race yesterday on the s-works version which is the same geometry just stiffer. I will say this bike if like a freggin goat, I found my self out of the saddle many of times on climbs because it would respond well too it. there was a 1.5 mile section of the race that was very rocky and i could tell it was a ht there, but for the rest of it, it just climbed! and would pick up speed so easly. I have the 39 X 26, that combined with the 11-36 mad me only use the 26t once and that was after allot of climbing. I am sure the expert is probably a little more comfortable on longer rides.